OLT, ONU AND PON SYSTEM AND INFORMATION TRANSMISSION METHOD IN PON SYSTEM

摘要

This application provides an OLT, an ONU, a PON system, and an message transmission method in a PON system. The method includes: sending, by an OLT, first message to an unregistered ONU, where the first message includes at least one piece of indication message, and one piece of indication message indicates a first power range and a first time range associated with the first power range; and receiving, by the OLT in the first time range, a registration message sent by the ONU, where a downstream receive power of the ONU falls within the first power range. Registration signals of ONUs whose downstream receive powers fall within a same power range are similar or differ little in signal strength when reaching the OLT, so that the OLT can quickly respond to a registration signal of an ONU, and an overall response time of the OLT for registration signals of different ONUs can be shortened.